<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="请输入要发表的内容（最多输入120字）:" maxlength="120" v-model="msg"></textarea>

        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in commentmsg" :key="item.add_time">
                <div class="cmt-title">
                   第{{ i+1 }}楼&nbsp; &nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
                </div>
                <div class="cmt-body">
                    {{ item .content === "undefined"?"此用户很懒，啥都没说":item .content}}
                </div>
            </div>
        </div>

        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
</template>
<script>
import { Toast } from 'mint-ui'
export default {
    data() {
        return {
            pageIndex: 1,   //默认展示第一页数据
            commentmsg: [],   //评论的列表内容
            msg: ""    //发表评论的内容
        }
    },
    created() {
        this.getComments()
    },
    methods: {
        getComments() {  //获取评论
            this.$http.get("http://www.liulongbin.top:3005/api/getcomments/" + this.id + "?pageIndex=" +this.pageIndex ).then( result => {
                console.log(result.body)
                if(result.body.status === 0){
                    // this.commentmsg = result.body.message
                    //每当获取新评论数据的时候，不要把老数据覆盖，应该老数据拼接一下新数据
                    this.commentmsg = this.commentmsg.conact( result.body.message );
                } else {
                    Toast( '加载评论失败' )
                }
            })
        },
        getMore() {  //加载更多
            this.pageIndex ++ ;
            this.getComments();
        },
        postComment() {   //发表评论
            if(this.msg.trim().length === 0){
                return Toast('评论内容不能为空！')
            }
            this.$http
            .post('http://www.liulongbin.top:3005/api/postcomment/' + this.id, { 
                content:this.msg.trim() 
                //this.$route.params.id
            })
            .then(function(result){
                if(result.body.status === 0){
                    var cmt = {
                        user_name: "匿名用户",
                        add_time: Date.now(),
                        content: this.msg.trim()
                    };
                    this.commentmsg.unshift(cmt);
                    this.msg = "";
                }
            })

        }
    },
    props: ["id"]
}
</script>
<style lang="scss" scoped>
    .cmt-container{
        h3{
            font-size:18px;
        }
        textarea{
            font-size: 14px;
            height: 85px;
            margin:0;
        }
        .cmt-list{
            .cmt-item{
                margin: 5px 0;
                font-size: 13px;
                .cmt-title{
                    line-height: 30px;
                    background-color: #ddd;

                }
                .cmt-body{
                    line-height: 40px;
                    text-indent: 2em;

                }
            }
        }
    }
</style>


